Cyclocephala longula is a species of rhinoceros beetle in the family Scarabaeidae. It is found in North America, where it has been recorded from Canada (British Columbia), the United States (Arizona, California, Colorado, Idaho, Illinois, Kansas, Montana, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, Wyoming), and Mexico (Baja California, Baja California Sur, Chihuahua, Sonora).
